Draughts can be an ongoing issue in homes, especially during colder months. These unwanted currents of cold air not only make rooms feel chilly and uncomfortable, but also contribute to increased energy bills as heating systems work harder to maintain a consistent temperature. Draught-proofing windows is a simple, yet effective solution to increase both comfort and energy efficiency within your home. Here are 9 cost-effective ways to draught-proof your windows and save on energy bills in 2025.
1. Spot the Leaks Like a Pro
Hold a lit candle or a match near your closed window edges on breezy days. A flickering flame likely signals air leakage; which means it’s time to seal it up. A classic, lo-fi way to put your window seals to the test.
2. Apply Caulk or Silicone Sealant
Seal non-moving frame joints with caulk or use flexible silicone for areas prone to moisture. It’s cheap (about £5 for a tube, and an extra £6 or so for a caulk gun to help you apply it neatly), DIY-friendly, and adds immediate insulation without needing to call in the experts.
3. Add Weatherstripping or Brush Seals
If you still need your windows to open, you won’t want to seal them shut. Instead, fit soft strips around the edges to block the gaps. Foam strips are the cheapest and easiest option, but they don’t last all that long. Brush strips cost a little more, but they stay effective for longer and also help keep dust out. You should be able to find both products online or from a decorating/DIY shop.
4. Install Draught Excluders
You’ll have likely seen these blocking the gaps below a door, but you can get a similar product for windows, too. Place foam or fabric tubes along sills to block bottom-edge draughts. You can also DIY one using old tights or socks filled with rice, cheap, effective, and eco-friendly!
5. Use Thermal Lined Curtains, Blinds, or Heavy Drapes
Thick, lined curtains or honeycomb blinds (cellular shades) trap air and create a thermal barrier. They’re elegant and practical, even for the summer months, helping keep heat out. If your windows are letting air in and out, properly lined thermal curtains will go a long way to maintaining a comfortable temperature if your budget won’t quite stretch to replacement windows or seals.
6. Apply Insulating Window Film
Window film is a thin, transparent layer that sticks directly onto the glass. It works by reflecting heat back into the room while still letting in natural light. In winter, this makes your home feel warmer and reduces the need for constant heating. The film is easy to apply yourself with a spray bottle and squeegee, and it can be peeled off cleanly when you no longer need it. Some films even come with UV protection, helping to reduce fading on furniture and fabrics. Much cheaper than replacing the windows, and cosmetically not something you’re likely to notice if installed carefully.
7. Check Gaps Between Frame and Masonry
Gaps between the window frame and the masonry of the wall are often the biggest culprits. Fill these cheaply and easily with silicone or expanding filler for a lasting seal. Who says there are no quick fixes in DIY?
8. Inspect and Fix Window Hardware
Loose hinges, worn seals, or ill-fitting frames reduce a window’s effectiveness. Tighten hinges, clean moving parts with WD‑40, replace old seals (especially on UPVC windows) to restore snug fits. Sometimes a bit of upkeep goes a long way to extending the life of your windows!
9. Consider Professional Upgrades for Older or Complex Windows
If you live in an older property with original timber frames or sash windows, draught-proofing can be more complicated. Ill-fitting sashes, warped wood, or delicate heritage frames often need a specialist touch. A professional can fit discreet brush seals or parting beads that block cold air without spoiling the look of the window. In many cases, this type of work can cut heat loss by a third or more, while still keeping the character of your home intact.
Why It Still Matters in 2025
With rising energy costs and new energy standards, draught proofing has never been more relevant. According to Energy Saving Trust, stopping window draughts can save around £40 per year per window! That’s money straight back in your pocket, but it’s not just about the bills. Plugging gaps also makes rooms feel instantly warmer and more comfortable, so you’re not going to see your own breath in the bedroom or find yourself cranking the heating constantly just to stay comfortable. And if you work from home as many of us now do, that’s another 8 or 9 hours a day you’ll be battling to keep cosy.
Enhance Efficiency with Quality Rooflights
Rooflights play a critical role in maintaining a well-insulated home, and quality design is essential to ensure they don’t let in unwanted draughts.
At Toughened Glass Systems, our custom roof lights are meticulously crafted with advanced sealing technology to keep your home airtight, providing a comfortable and energy-efficient environment.
All our rooflights and skylights promise increased natural light without compromising on warmth or efficiency, ensuring that no chilly breezes disrupt your space.
Contact us today for expertly designed roof lights that keep your home cosy and draught-free, all year round.
Our reviews and trade history page details our extensive history in the industry and supplies you with the confidence that our team can get the job done for the right price.
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- 10 Ways To Insulate Windows To Keep Out Heat
FAQs on draught proofing your home
What maintenance is required after draught-proofing windows?
Regularly check your window seals for any signs of wear or peeling, especially after extreme weather. Cleaning the window frames and seals periodically can prevent dust and debris from compromising the seal’s effectiveness. Reapply or replace the draught-proofing materials as needed to maintain performance.
Does draught proofing have any impact on noise reduction?
Yes, sealing draughts can also reduce noise levels from outside. By closing gaps around your windows, you can limit the amount of external noise that enters your home, creating a quieter indoor environment, particularly in busy areas.
Will draught proofing my home increase property value?
Effective draught proofing can make your home more energy-efficient and comfortable, which may appeal to potential buyers. Energy-efficient homes are often seen as more attractive on the market, as they offer reduced running costs and improved environmental impact.